Fermi Discovery of Gamma-Ray Emission from NGC 1275
- A. ABDO, A.
- ACKERMANN, Markus
- AJELLO, Marco
- ASANO, K.
- BALDINI, Luca
- BALLET, Jean
- BARBIELLINI, Guido
- BASTIERI, D.
- M. BAUGHMAN, B.
- BECHTOL, K.
- BELLAZZINI, R.
- D. BLANDFORD, R.
- D. BLOOM, E.
- BONAMENTE, E.
- W. BORGLAND, A.
- BREGEON, J.
- BREZ, A.
- BRIGIDA, M.
- BRUEL, Pascal
- H. BURNETT, T.
- A. CALIANDRO, G.
- A. CAMERON, R.
- CARAVEO, P. A.
- M. CASANDJIAN, J.
- CAVAZZUTI, E.
- CECCHI, C.
- CELOTTI, A.
- CHEKHTMAN, A.
- C. CHEUNG, C.
- CHIANG, J.
- CIPRINI, S.
- CLAUS, R.
- COHEN-TANUGI, J.
- COLAFRANCESCO, S.
- R. COMINSKY, L.
- CONRAD, J.
- COSTAMANTE, L.
- D. DERMER, C.
- DE ANGELIS, A.
- DE PALMA, F.
- W. DIGEL, S.
- DONATO, D.
- DO COUTO E SILVA, E.
- S. DRELL, P.
- DUBOIS, R.
- DUMORA, D.
- FARNIER, C.
- FAVUZZI, C.
- FINKE, J.
- B. FOCKE, W.
- FRAILIS, M.
- FUKAZAWA, Y.
- FUNK, S.
- FUSCO, P.
- GARGANO, F.
- GEORGANOPOULOS, M.
- GERMANI, S.
- GIEBELS, B.
- GIGLIETTO, N.
- GIORDANO, F.
- GLANZMAN, T.
- A. GRENIER, I.
- GRONDIN, M.-H.
- E. GROVE, J.
- GUILLEMOT, L.
- GUIRIEC, S.
- HANABATA, Y.
- K. HARDING, A.
- C. HARTMAN, R.
- HAYASHIDA, M.
- HAYS, E.
- E. HUGHES, R.
- J'OHANNESSON, G.
- S. JOHNSON, A.
- P. JOHNSON, R.
- N. JOHNSON, W.
- KADLER, M.
- KAMAE, T.
- KANAI, Y.
- KATAGIRI, H.
- KATAOKA, J.
- KAWAI, N.
- KERR, M.
- KNÖDLSEDER, Jürgen
- KUEHN, F.
- KUSS, M.
- LATRONICO, L.
- LEMOINE-GOUMARD, M.
- LONGO, F.
- LOPARCO, F.
- LOTT, B.
- N. LOVELLETTE, M.
- LUBRANO, P.
- M. MADEJSKI, G.
- MAKEEV, A.
- N. MAZZIOTTA, M.
- E. MCENERY, J.
- MEURER, C.
- F. MICHELSON, P.
- MITTHUMSIRI, W.
- MIZUNO, T.
- A. MOISEEV, A.
- MONTE, C.
- E. MONZANI, M.
- MORSELLI, A.
- V. MOSKALENKO, I.
- MURGIA, S.
- NAKAMORI, T.
- L. NOLAN, P.
- P. NORRIS, J.
- NUSS, E.
- OHSUGI, T.
- OMODEI, N.
- ORLANDO, E.
- F. ORMES, J.
- PANEQUE, D.
- H. PANETTA, J.
- PARENT, D.
- PEPE, M.
- PESCE-ROLLINS, M.
- PIRON, F.
- PORTER, T.A.
- RAIN'O, S.
- RAZZANO, M.
- REIMER, A.
- REIMER, O.
- REPOSEUR, T.
- RITZ, S.
- Y. RODRIGUEZ, A.
- W. ROMANI, R.
- RYDE, F.
- F.-W. SADROZINSKI, H.
- SAMBRUNA, R.
- SANCHEZ, D.
- SANDER, A.
- SATO, R.
- M. SAZ PARKINSON, P.
- SGR'O, C.
- SMITH, David Stanley
- D. SMITH, P.
- SPANDRE, G.
- SPINELLI, P.
- STARCK, Jean-Luc
- S. STRICKMAN, M.
- W. STRONG, A.
- J. SUSON, D.
- TAJIMA, H.
- TAKAHASHI, H.
- TAKAHASHI, T.
- TANAKA, T.
- B. TAYLOR, G.
- G. THAYER, J.
- J. THOMPSON, D.
- F. TORRES, D.
- TOSTI, G.
- UCHIYAMA, Y.
- L. USHER, T.
- VILCHEZ, N.
- VITALE, V.
- P. WAITE, A.
- S. WOOD, K.
- YLINEN, T.
- ZIEGLER, M.
- D. ALLER, H.
- F. ALLER, M.
- I. KELLERMANN, K.
- KOVALEV, Y.Y.
- A. KOVAL, Yu.
DOIAbstract
We report the discovery of high-energy (E>100 MeV) gamma-ray emission from NGC 1275, a giant elliptical galaxy lying at the center of the Perseus cluster of galaxies, based on observations made with the Large Area Telescope (LAT) of the Fermi Gamma ray Space Telescope. The positional center of the gamma-ray source is only ~3' away from the NGC 1275 nucleus, well within the 95% LAT error circle of ~5'.The spatial distribution of gamma-ray photons is consistent with a point source. The average flux and power-law photon index measured with the LAT from 2008 August 4 to 2008 December 5 are F_gamma = (2.10+-0.23)x 10^{-7} ph (>100 MeV) cm^{-2} s^{-1} and Gamma = 2.17+-0.05, respectively. The measurements are statistically consistent with constan...
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